Dillon Serna, front, and Shane O’Neill will join the U.S. U-21 team this week in California.

Three Colorado Rapids players will join the U.S. Under-21 National Team camp on Sunday, following the club’s match against the San Jose Earthquakes on Saturday.

The Rapids announced Friday that Shane O’Neill, Dillon Serna and Marlon Hairston will participate in the U.S. U-21 camp in Carson, Calif. until Thursday of next week. All three players will then rejoin the Rapids prior to their April 26 fixture in Seattle against the Sounders.

O’Neill and Serna, both Rapids Homegrown players, played with the U-20 squad during the 2013 U-20 World Cup in Turkey. Hairston, who was with the U-20s early in the summer, missed the World Cup due to injury.

Rapids VP of Soccer Operations Paul Bravo called it an “exciting opportunity” and evidence of the Rapids commitment to youth development.